Washington County, OR Population

Overview

596,969

Total Population

37.3

Median age

50.19%

Female population %

99.2:100

Gender ratio (M:F)

30-34 years

Largest age group

47.5

Total dependency ratio

White

Largest racial group

102,357

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Washington County's population is young compared to the rest of the country:

The median age in Washington County is 37.3, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Washington County's population under 18 was 22.71%, compared to the 22.51% nationwide.
Washington County's elderly or the senior population (over 65 age) was 13.43% as compared to 16.04% nationwide.
Of the total population in Washington County, 18.75% were under the age of 15, 19.62% aged 15 to 29, 48.20% aged 30 to 64, 11.91% aged 65 to 84, and 1.52% were 85 years of age and older.

There are 2,251 more females than males in Washington County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.19% females and 49.81% males in Washington County, OR.
The Washington County, OR gender ratio is 99.2:100 i.e. 99.2 men to 100 women (0.992).
For male population, the largest age group is 30-34 years with a population of 24,548.
For the female population, the largest age group is 30-34 years with a population of 23,306.

Washington County's population has become increasingly diverse:

Racial distribution of Washington County population: 71.47% are White, 2.28% are Black or African American, 0.79% are American Indian and Alaska Native, 10.81% are Asian, 0.44% are Native Hawaiian and other Pacific Islander, 5.62% are some other race and 8.58% are multiracial.
Washington County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 102,357 is Hispanic or Latino (of any race), and 494,612 (82.85% of the total population) is Non-Hispanic.
The largest racial group in Washington County is White with a population of 426,654 (71.47% of the total population).

Washington County's population has already reached its peak and is showing a trend of decline:

The peak population was 602,494 in the year 2021
From 2000 to 2010, Washington County's population increased by 83,278 (18.57%), as compared to the national growth of 9.63%.
From 2010 to 2020, Washington County's population increased by 69,449 (13.06%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
Between the year 2000 and 2022, Washington County's population was lowest in year 2000 at 448,374.